“We will have a meeting, and it’s going to be an informal and consultative meeting,” he told reporters on the sidelines of the Gas Exporting Countries Forum held in Doha.

The Qatar official further emphasized that 11 countries had confirmed their participation, without naming them.

OPEC agreed in Algeria on September to cut oil production to 32.5 million barrels a day (mb/d) from current level of 33.24 mb/d to boost the market.

However, disagreements persist among producers on details of a plan to cut the output.

The group will discuss concrete levels of output by each country at its next formal meeting on Nov. 30 in Vienna, Xinhua reported.

OPEC’s oil production cut will cap output at 32.5 mb/d in order to re-balance the supply-side of the oil market, Saudi Arabia’s oil minister Khalid al-Falih said on Thursday.

OPEC must cut more than 1 mb/d if it wants to squeeze under that ceiling, and Saudi Arabia will be expected to do most of the heavy lifting as Iran and Iraq – two of the bloc’s largest oil producers – will only be freezing production at current levels, not cutting, the OilPrice.com reported.

Previous reporting on the coming deal said that Iran, Libya and Nigeria would be exempted from the agreement’s production restraints due to the international sanctions, civil wars and domestic insurgencies each country has faced, respectively.

Once the special exemptions were announced, Iraq also demanded an exemption from the deal as it faces the hiking costs of the battle against the ISIL in Mosul – one of the terrorist group’s last major strongholds in the country, OilPrice.com further added.